Top surface of handbag flap



FIG. 1 is a top plan view of the top surface of handbag flap showing the new design; and,

FIG. 2 is the left side elevational view of the top surface of handbag flap showing the new design.

The broken line showing of handbags and their clasps, in the views, is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a top surface of handbag flap, as shown and described. 